Electrical Engineering

The Photon

00:59

Groetjes @MLM

coding_corgi

Yo yo yo!

MLM

@ThePhoton hey

i'm trying to find a nice logic/voltage shifter for 1.8v to 3.3v (maxim or TI)

The Photon

I've had the good luck to never have to work with 1.8 V so don't know anything off the top of my head.

Well, that was true until last week---then I discovered part of the design I am working on (done by another engineer) uses 1.8 V, and expects the 1.8 V logic levels to just be detected correctly by a 2.5 V circuit without any translator :(

It worked fine for over a year, then somebody changed the CPLD code and now we have problems.

MLM

@ThePhoton but that is only step down right?

The Photon

No step up.

1.8 v > 0.5 * 2.5 V, so it "works" most of the time...

MLM

01:13

@ThePhoton Xbox probably only uses 1.8v because it is harder to mess with. I am trying to interface with a controller

coding_corgi

@MLM Hacking an Xbox?

The Photon

@MLM Monodirectional or bidirectional? and how fast?

MLM

@ThePhoton nah

The Photon

Do you know what data rate is going over the wire?

And how many wires?

I don't know anything about what a "normal player" is.

Or, you mean, having your circuit emulate a person pushing buttons on the controller?

MLM

@ThePhoton this ^

The Photon

01:20

So you won't need to switch voltages more than maybe 10 times per second?

Anyway you don't need to worry about MHz speeds.

Nevermind that, not so great for bidirectional

MLM

@ThePhoton needs to be way faster than 10 times a second - I want to be as fast as the chips will go. The SPI expander will go at 10 Mhz if needed

People seek out 144hz monitors/panels just to get the competitive advantage on twitch shooters

point taken tho

The Photon

01:35

Would this work? nxp.com/documents/data_sheet/GTL2003.pdf

Smart Shovon

Hey... anyone can help me about comment ?

i want to show comments from users who aren't logged in and who logged in.2 types user can see comment but logged in user only post comment.. any one can help me. i have a comment.php loop

coding_corgi

@SmartShovon This is EE, not SO, though they're are lot's of programmers here, not PHP mainly though...

Smart Shovon

sorry

:(

coding_corgi

@SmartShovon Maybe you should wait for @CamilStaps, though he won't be around for a while though...

The Photon

@SmartShovon Are you talking about querying the StackExchange database?

Smart Shovon

01:41

no i talking about comment.php loop....

coding_corgi

@SmartShovon Is that some sort of library?

Smart Shovon

can you see this post wordpress.stackexchange.com/questions/100791/… if you don't understand then i show some example

coding_corgi

@SmartShovon You should probably ask a question on SO

MLM

@ThePhoton sorry, cleaning the fishtank. will look at it soon

Smart Shovon

can i show example ... i think you can understand

The Photon

01:47

@MLM NP, it's basically the I2C level-translator trick, but promised to work with levels between 0.8 and 5 V. Like with I2C, speed will depend on pull-up resistors used.

Smart Shovon

@coding_corgi can i show some example?

The Photon

02:03

@MLM, here's the part we are using in my project: ti.com/lit/ds/symlink/sn74cb3t3245.pdf

coding_corgi

@SmartShovon Sure you can

The Photon

I am not sure it will work for you, but I think if you had 2.5 V Vcc, it could translate 3 V logic down to about 2.0 V, which would "probably work" as an input to 1.8 V circuits...I think it would have a problem translating back the other way though, so probably not right for your application.

Smart Shovon

@coding_corgi please go this site techtunes.com.bd/reports/tune-id/210495 please see in below comment sector ... you can see comment without logged in but if you go my site projuktichowa.com/archives/1287 you can not see comment without logged in . but i want without logged in you can see comment..

MLM

@ThePhoton the chip for your application looks a lot like a 74lvc245 which I was trying to use earlier

The Photon

@MLM LVC245 needs a direction input, CB3T3245 doesn't.

MLM

02:15

it would be nice if it dip because I am just prototyping this thing atm which severely limits everything... The only tssop, whatever adapters I have are not the correct width.

TI has such a weird naming convention for the package types. I always have to use this

Anindo Ghosh

03:51

@Kortuk Is there some kind of double standard where some users can make the exact same comment I do in their answer, and they do not get edited out, but mine do?

2

A: Digital electronics and number systems

I'll keep this brief since this question will soon be closed, but digital numbers are expressed in electronics overwhelmingly in binary. That way each digit can be represented as a voltage that is either high or low. Lots of electronics can perform numeric and other digital operations on these ...

0

A: How do you write your own linker script files? Or do you use IDE's?

This is way too broad a topic, especially seeing as you didn't even mention what processor and linker. Since this question will likely be closed, I will only answer briefly. Yes I write all my own linker control files (they aren't scripts since the linker isn't actually executing them) for PICs...

1

A: Microcontroller with ADC and capable of SPI communication

I don't know what you mean by "UWB" (use standard or common abbreviations, no I'm not going to look it up, it's your job to explain), but many many micros have 10 bit A/Ds and SPI hardware. Even without the SPI hardware, SPI is simple to do in firmware by controlling the I/O lines directly. In ...

@Kortuk Or is it simply that some users are more important than others?

angelatlarge

@AnindoGhosh Tangential to your question, what is the rationale behind keeping the answer brief if the question is likely to get closed? Does proximate answer closing preclude answer prolixity somehow?

Anindo Ghosh

@angelatlarge I've had 3-4 experiences where I spent 10 minutes writing an answer, by which time the question got closed and I could not post.

@angelatlarge It's more about "Can't take the time to put down details" rather than "let me be as verbose as possible", really.

angelatlarge

@AnindoGhosh That only makes partial sense: if you post the question without the length disclaimer you are more likely to get it in before the closing bell (so to speak), and then you can edit the answer further.

The Photon

@AnindoGhosh In 2 out of 3 of those cases, the question did actually get closed. Mods might put a lower priority on cleaning up answers to closed questions.

Anindo Ghosh

@angelatlarge You've seen the kind of answers I write: Diagrams, bulleted lists, and so on. No point editing an answer once the question is closed, nobody will look at it.

angelatlarge

04:07

@AnindoGhosh Ok, I guess I see that.

Anindo Ghosh

Look at this question, "*closed as not a real question by ... 13 hours ago*" and "*edited 1 hour ago

Kortuk♦*":

-2

Q: Vibrating bracelet

I am not a technical person. I want to design a vibrating unit that can be inserted into a bracelet which will vibrate x times per day randomly. I would like to be able to alter x on an ad hoc basis. These are the components that I think I would need. 1 x vibrating motor 1 x coin cell battery 1...

pic

angelatlarge

@AnindoGhosh I figured it was something like that. Likely that @Kortuk saw the "will be closed soon" on your answer and not on Olin's, I would think.

Anindo Ghosh

@angelatlarge Note that Kortuk is a commenter on some of those Olin answers.

angelatlarge

@AnindoGhosh Mmmm.. that raises the question you ask. I have a few more guesses, but I'll wait to hear from the horse's mouth.

Anindo Ghosh

@angelatlarge Same.

angelatlarge

04:21

Ok, fixed a few bugs, but the program is still Cheezoid-ing. :( Back to debugging...

The Photon

@AnindoGhosh Gotta say, I think it's pretty dumb to vote to close and then answer the question...

Anindo Ghosh

@ThePhoton Where did I do that? I don't think I would consider that logical.

angelatlarge

@ThePhoton Maybe he was just trying to help the OP out :)

The Photon

@AnindoGhosh One of the answers you linked, the same person voted to close.

Anindo Ghosh

@ThePhoton It's like "I will put in an answer, then try to ensure others cannot".

The Photon

04:24

@AnindoGhosh Exactly

Anindo Ghosh

@ThePhoton Ohhh, you don't mean me. Sorry, I misunderstood that observation.

The Photon

He didn't get many +1's for those though

angelatlarge

@AnindoGhosh Seems logical enough to me

The Photon

When was Kortuk elected moderator?

angelatlarge

@ThePhoton Before my virgin EE birth

Anindo Ghosh

04:26

@ThePhoton Beyond a point, the +1's don't matter. I'm sure I have dozens of answers to unpopular questions out there, where I know at the outset that I can't get votes.

@ThePhoton However, the answer needs to be out there - Most recently, for instance, the Hendershot scam question. My answer tries to ensure that at least some people will not get taken in by the scam, yet I know it's not a vote-worthy question.

The Photon

@AnindoGhosh For example, shopping questions, if I know an/the answer, I vote to close, then answer in a comment so OP doesn't think "buncha jerks don't want to help."

Anindo Ghosh

@ThePhoton Yup, that I could go with (and I have done similar)

Sadly, we on this site seem to spend more energy on closing questions than helping people (including helping people improve their questions).

jippie

06:08

good morning

angelatlarge

@jippie Good... mumble mumble ... sucky day.. mumble mumble... MORNING!

@jippie Welcome to the first day of your retirement!

@jippie The bingo hall is in the back.

@jippie Your complimentary walker will be arriving shortly

user61389

@jippie thanks for those links!

jippie

@angelatlarge oh right, I said that

@CamilStaps yw

angelatlarge

@jippie And we took you at your word

jippie

06:29

not answering questions already

@CamilStaps in this article is a better stepper motor table:

blog.linformatronics.nl/134/electronics/…

user61389

@jippie This connection is insecure.

angelatlarge

@CamilStaps Just means that they are using a self-signed certificate.

user61389

@angelatlarge I know, do that myself as well

angelatlarge

@CamilStaps Just don't send them any credit card info

user61389

@jippie thanks :)

jippie

06:33

did you read it before pasting it? :-p

user61389

@angelatlarge I removed the s from https ;)

user61389

@jippie I scanned :)

jippie

@angelatlarge 'they' ?

angelatlarge

@jippie Maybe you have minions...

@jippie All your bingo buddies

Do you guys know what autoboxing is?

jippie

@angelatlarge No I have no idea, please explain

Anindo Ghosh

06:47

@angelatlarge I know what beatboxing is, does that help? Or do I need to grab a cup of Java to answer that one?

angelatlarge

@jippie Oh, well, that was a preliminary to a next question. in any case, in a higher-level languages (e.g. Java) there are primitive int types and then there are object types that wrap them (e.g. Integer types). Autoboxing is the name to the promotion of base types like int s to higher object types like Integer.

This does not come up in lower level languages (e.g. C) or higher level languages (like Python) for opposite reasons. In C there are no objects, and in Python everything is always an object.

Anyway, rant/lecture/monologue/aria over.

... La donna e mobile... oh, sorry, now aria is really over.

jippie

I stopped reading where you wrote higher level language eg Java

angelatlarge

@jippie All those letters for nothing.

jippie

:p

PeterJ

@CamilStaps, did you see the message for you (it was missing the @) lol:

Maybe if you didn't vote to close a perfectly valid question I wouldn't be having this problem. And please do not edit my questions I don't appreciate it.

user61389

06:52

@PeterJ oh, where?

PeterJ

-1

Q: Verification of homework problem pipelined branch prediction

Assume a 5-stage pipelined processor using static branch prediction, with an always-not-taken assumption. Assume 25% of the executed instructions are branches. Assume 60% of all branches are taken. (a) if branch outcome is determined in the EXECUTE stage (Stage 3), how many cycles will it take t...

hardware mips

user61389

lol :)

angelatlarge

@PeterJ Nice one.

@PeterJ You can link to the comment and post it here, you know that, right?

Maybe if you didn't vote to close a perfectly valid question I wouldn't be having this problem. And please do not edit my questions I don't appreciate it. — John Takiyama 27 mins ago

There is an update.

PeterJ

@angelatlarge, no I didn't know that, how you you go about it?

user61389

@angelatlarge has read his markdown! ;)

angelatlarge

06:58

Unfortunately I marked it rude/offensive before copying the link, and it has disappeared :(

@PeterJ All the times (as in "27 mins ago") are links. Copy and paste those

@PeterJ Chat automagically expands them.

PeterJ

@angelatlarge, ahhh thanks!

user61389

@PeterJ just put the link to the comment and nothing else in your message

angelatlarge

@CamilStaps Some things (like auto Stack Overflow links) get expanded even when there is other text. I still haven't figured out all the rules.

Looks like John Takiyama has decided to take his precious ball and go home. I am crushed.

user61389

@angelatlarge really? Let me test that stackoverflow.com/q/16767928/1544337 :( ?

user61389

@angelatlarge his old question's still here: electronics.stackexchange.com/q/70571/17592

angelatlarge

07:05

What about this:
http://stackoverflow.com/questions/9278647/zoom-camera-in-surfaceview-preview

Nope. Linebreak does not help

Time for a beer

@AnindoGhosh Are you around?

Anindo Ghosh

@angelatlarge Probably

angelatlarge

@AnindoGhosh Got a minute for a question?

Anindo Ghosh

@angelatlarge Sure, shoot

angelatlarge

@AnindoGhosh So I was happy enough with my resistor reader to start porting it to Android, and therein I am running into problems.

The original work I did was using 120px-wide image or so, and that was fine. On Android I am trying to use the preview for capturing the image.

Anindo Ghosh

@angelatlarge Was it not on Android in the first place?

angelatlarge

07:20

@AnindoGhosh Because it was much faster to iterate on the desktop: trying different approaches and algorithms.

@AnindoGhosh Sorry misread that. No it was not.

Anindo Ghosh

@angelatlarge OK preview won't work for at least one situation: The preview does not use flash, so there may not be enough light, or may be chromatically biased. The flash provides a decent white reference

angelatlarge

@AnindoGhosh Hmm... I thought you could use flash as a "light" - I need to look into that, thanks!

Anindo Ghosh

@angelatlarge Go on please

angelatlarge

@AnindoGhosh I am having another problem with the preview: preview resolution that all phones support is 640x480. And given the minimal focus distance on my camera, the resistor image ends up being quite small, namely 70px or so.

Anindo Ghosh

@angelatlarge By the way, do you need to use the preview as source? You can always ask the OS to return a captured image in a resolution of your choice, IIRC. Or was that on some other OS?

@angelatlarge The preview might be useful to determine extents (cropping rectangle), right?

angelatlarge

07:24

(Going on for the moment, your question is at the top of the stack) I think the 70px size might be too small to accurately resolve band distances (at least given my algorithms), and band distances are important in figuring out where the tolerance band is.

@AnindoGhosh Why preview: couple of reasons. One is that preview data gets passed around as memory object, unlike a real captured image (I think): you don't have to touch the filesystem. B) is that I thought of doing this dynamically eventually: point the phone in a general direction, and the app looks for resistors and identifies them on the fly.

Taking an image is generally not done continuosely, so the user will have to trigger.

Anindo Ghosh

@angelatlarge True. 70 px for a 3+1 (say around 8 widths of a typical band) would give under 9 pixels a band. Add in a bit of thermal speckle, and you have junk data.

@angelatlarge My design model would be, use the preview until "resistor-like shape" is found, then define crop extent and trigger a capture. No user interaction required for the actual capture.

angelatlarge

@AnindoGhosh Yeah, I've looked into "area of interest" detection, but that seemed like a non-trivial task, possibly involving training data, so I decided to leave that till later.

@AnindoGhosh Currently I am just trying to analyze whatever is in the targeting reticle

Anindo Ghosh

@angelatlarge If I were shooting for quality data, I might even do this: identify resistor, define crop extent, trigger AF, trigger capture, do the whole thing again from identify stage (to deal with camera shake), take 3 good frames, align and merge to de-noise, and you have excellent color information.

@angelatlarge Isn't there a shape matching library out there for the Android camera? Not a built-in library, but something I saw on a blog last to last year.

angelatlarge

@AnindoGhosh You mean OpenCV?

Anindo Ghosh

@angelatlarge No, I mean "looks like this point-collection polygon", something extracted from the smile identification libraries for use with more generic / geometric polygons.

angelatlarge

07:31

@AnindoGhosh I haven't found much outside of OpenCV.

Anindo Ghosh

@angelatlarge It works real-time, very much like the face-tracking that many android phones can do.

angelatlarge

@AnindoGhosh Face tracking uses different technology, I think. Something like Hu moments (though not really Hu moments)

Anindo Ghosh

@angelatlarge Anyway, that's a separate sidetrack. Back to your problem. No, 70 pixels isn't good enough. Capture and crop if "Area of Interest" is for later. But capture and crop multiple times, most people will have serious camera shake for something that close to the lens.

angelatlarge

@AnindoGhosh I sure do. Yeah, for the right kind of crop I still need some kind of brains. Anyway, you think forget the preview mode for now, let the user put the resistor in a reticle and press a button?

Anindo Ghosh

@angelatlarge I have no idea how either face tracking, or "matched-this-polygon" thing works. I just vaguely recall the blog article mentioning that their library identifies and real-time-tracks a shape such as the defining polygon for a cigarette lighter, even to the extent of slight perspective shifts, so the lighter need not be head-on (not just perpendicular rotation handling, but perspective distortion).

angelatlarge

07:35

@AnindoGhosh Although, I wonder if I can use multiple preview images to construct a higher-res still: there is technology for that, though I don't know exactly how it works. In a sense it would use the shake to help, assuming I can crop the result correctly....

Anindo Ghosh

@angelatlarge My gold standard for this is any of the several business card scanning software out there. They all insist on a perfect placement and a capture trigger by the user. Some of them actually beep when they see verticals or horizontals, so you know you have the business card aligned reasonably well.

angelatlarge

Looks like it is patented :)

google.com/patents/US7064779

Anindo Ghosh

@angelatlarge There's prior art to that (before Oct 23, 2001), because I have seen that technique used by law enforcement software to extract a very good face photo, from a series of security video frames, way back in 1996 or so. I was consulting for a project, and the image stuff was being done by a different set of consultants.

angelatlarge

@AnindoGhosh Hmm.. so I guess that's the plan for now: try for multiple-still -> higher res, and if not, user button press -> take picture, process that.

Anindo Ghosh

@angelatlarge Also, low-light photographers (that's my specialization) who need to capture a still object hand-held in totally unacceptable light, routinely shoot a long burst, then use a photo editing tool to merge and thus extract higher sharpness and resolution. Let me show you an example, one sec.

angelatlarge

07:40

@AnindoGhosh neat. Please do.

Anindo Ghosh

angelatlarge

I guess the name of the technique I am looking for is "super resolution": cs.utsa.edu/~qitian/seminar/Fall04/superresolution/…

Anindo Ghosh

5 frame burst, 10 FPS, 3200 ISO, hand-held, no visible light at all (could not see the mountaintop with naked eye).

angelatlarge

@AnindoGhosh Wow, neat. So to get more "light" I can imagine how you would just "add" the pixels, but how do you combine to increase sharpness?

jippie

@AnindoGhosh too much red in there ;o)

Anindo Ghosh

07:46

@angelatlarge Basically, the concept is that consecutive frames will have noise or shake in different positions relative to the static subject. If you can align any "features", such as edges, on any three non-parallel axes, you simply stack the images, and the static subject reinforces itself while the noise and blur attenuates.

@angelatlarge I've done 20 frame bursts in extreme situations. In the photo world we call it image stacking, I don't know the scientific term for it.

angelatlarge

@AnindoGhosh Yeah, I see.

PeterJ

@angelatlarge, you can download a free copy of PhotoAcute Studio, it just watermarks the images. They have a pretty good description on their web pages of how it all works:

photoacute.com/tech/index.html

angelatlarge

@PeterJ Cool thanks.

Anindo Ghosh

@angelatlarge Just for context, this is the same Kanchendzonga peak, a few minutes later, again hand-held, this time with a 500 mm lens and a 2x extender, just after the sunrise hit the peak:

angelatlarge

@AnindoGhosh @PeterJ The feature alignment would be the tough part, but maybe in some images using simply "find best rectangle" in each corner would work well enough.

jippie

07:50

@AnindoGhosh nice

angelatlarge

@AnindoGhosh Beautiful.

Anindo Ghosh

@PeterJ Yup, I have PhotoAcute Studio (paid, no watermark), though not sure if that's the one I used for that stack. I do my photo edits on some form of zen autopilot, I can never remember afterwards what I did an hour ago.

@angelatlarge Feature alignment for a resistor would be not too difficult - you are looking for parallel "edges". The edges of the resistor as seen from above, the edges of the bands, whatever you can find.

PeterJ

@AnindoGhosh, I went the tightwad way and submitted a new camera / lens profile, you can get a free copy of the pro version that way.

angelatlarge

@AnindoGhosh Need to read some literature. Possibly.

Anindo Ghosh

@PeterJ Oh, I see. Well, for me it's a business expense, so I don't worry too much (or at least did not, back when I was 100% doing photography).

@PeterJ But it's real sweet of them to give away pro versions for crowdsourced profiles.

angelatlarge

07:54

Another thing I am worried about is whether preview generates enough images quickly enough. The preview window updates fast, but not all those updates trigger onPreviewFrame(), I think. Not sure.

Anindo Ghosh

@angelatlarge That, I wouldn't know. Also, I assume it would depend on the device capabilities, processing-wise and camera-wise.

PeterJ

@AnindoGhosh, if I ever do another profile I'll remember to setup proper lighting next time, I started off flying until I ended up at f/32 end with average indoor lighting.

Anindo Ghosh

@angelatlarge Come to think of it, I've used stacking to generate 20 megapixel full-quality images from a tiny crop from the 10 megapixel 1d Mark III, with camera mounted on tripod, for one project. That one's client confidential (a hotel resort, shot from a hill top a mile away to simulate an aerial shot) so cannot show you.

angelatlarge

@AnindoGhosh Looks like there is ready-made code: code.google.com/a/eclipselabs.org/p/librarykozzion/source/…

Anindo Ghosh

@PeterJ I don't do "proper lighting", I do "available lighting" no matter what. My "secret power" is the ability to extract a wall-art quality image under the most trying light conditions.

@angelatlarge Neat! You're on your way!

angelatlarge

08:01

@AnindoGhosh Hopefully. I'll make a test client to see how it works. Then then I'd have to rewrite it to get rid of awt.Image and stuff. But I spend last day or so doing that so I have some practice :)

Anindo Ghosh

@angelatlarge Nice

angelatlarge

@AnindoGhosh It was ugly actually. I was stoopid, and wrote the entire resistor reader with reference to BufferedImage everywhere (it was for debugging, but I wanted to have that type of functionality). It took a while to come up with a way of how to get rid of all that but keep the debugging options for when I run it in the desktop environment.

Anindo Ghosh

@PeterJ Can you imagine the extreme light conditions for these next two frames? Both were shot hand-held, same event, and they'd really pushed my skill.

@angelatlarge haha

This next frame was much easier, though the contrast made for its own challenges. This was for this guy's music album cover.

PeterJ

@AnindoGhosh, nice work :-)

Stacey Anne

considering how cheap discretes are, if I'm designing a board revision with parts of the board unpopulated, is it worth leaving the discretes on, and saving myself the pain of soldering extra if I want to populate that part of the board later on?

Anindo Ghosh

08:11

@StaceyAnne For one of my clients, that seems to be their preferred option - they basically use solder jumpers between the "not to be used by default" part and the rest. For production runs of type A v/s B, they either have the jumper present or absent in the stencil. Works out cheaper for them than separate Pick & Place set-up costs.

Stacey Anne

dev production run, not the final product, and using my head wrt which discretes stay, obviously.

yeah, that was my thinking too

Anindo Ghosh

@PeterJ Thank you. Here's another extreme contrast one:

Stacey Anne

next question is then how easy is it to solder 0.5mm pin pitch by hand

PeterJ

@AnindoGhosh, nice...

Anindo Ghosh

@StaceyAnne No coffee or smokes for a couple of hours, tummy full, and with a magnifier, I do pretty OK for single solder points. For entire ICs at that pitch, it's easier: Solder the diagonally opposite corners, then solder everything into one big blob on each side, then use braid to pull off the solder. The contact points remain soldered. Needs the board to have resist, of course.

@PeterJ :-)

Stacey Anne

08:17

ah, good trick

angelatlarge

08:57

@AnindoGhosh Turns out that the code link I posted earlier contains nothing. So, for instance, if you wanted to find some super-resolution java code for me, I will not complain :)

Anindo Ghosh

@angelatlarge for image stacking? Super-resolution?

angelatlarge

@AnindoGhosh Yeah, super-resolution is the name of the technique (apprently) that you call image stacking, yes.

Anindo Ghosh

@angelatlarge I have no patience for looking at code today, but I'll paste some links as I find them, OK?

optnano.com/content/1/1/11

@angelatlarge users.soe.ucsc.edu/~milanfar/publications/journal/SRfinal.pdf

@angelatlarge imagej.1557.x6.nabble.com/…

angelatlarge

@AnindoGhosh I did see that last one.

Anindo Ghosh

@angelatlarge qe-superresolution.en.softonic.com

angelatlarge

09:07

@AnindoGhosh Rly?

Anindo Ghosh

@angelatlarge ??

angelatlarge

@AnindoGhosh an .exe file

Anindo Ghosh

@angelatlarge No, a pointer - for locating the algo / source.

angelatlarge

Oh

Anindo Ghosh

@angelatlarge If they could do it, it's probably got an algo floating around someplace.

angelatlarge

09:11

OK, time for bed

@AnindoGhosh Thanks a lot for your help!

PeterJ

@angelatlarge, good night. Aforge.NET is in C# but have some useful code snippets. I used it a while ago for a movement detection app and it has lots of edge detection type stuff, not sure about super-resolution.

angelatlarge

@PeterJ Cool, thanks. Will take a look if I remember in the morning.

user61389

12:38

@PeterJ you want to answer this:
movlw 0x01 ; move 0x01 to W register
xorwf port, F ; XOR W with port & store result in port

user61389

And I don't think it's possible to make that faster :)

PeterJ

@CamilStaps, thanks ;)

user61389

@PeterJ thank you! :)

William 'MindWorX' Mariager

13:18

Anyone here familiar with Arduinos?

Specifically, the UNOr3?

I'm curious what the current limit on the 5V line is. I know the limit on the digital pins is 40mA.

But I'm having a hard time finding anything on the 5V and 3V3 lines.

yogece

13:41

@StaceyAnne hi

Stacey Anne

hi yogece

yogece

@StaceyAnne you are ASIC expert right

abdullah kahraman

13:58

Hi!

yogece

@abdullahkahraman hi

Anindo Ghosh

@William'MindWorX'Mariager 5v line has a 500 mA PTC fuse on it.

@William'MindWorX'Mariager And 3.3 V line limit is 50 mA

William 'MindWorX' Mariager

@AnindoGhosh Thanks. :D

Anindo Ghosh

@William'MindWorX'Mariager arduino.cc/en/Main/arduinoBoardUno has the specs

abdullah kahraman

@William'MindWorX'Mariager Couldn't you find a longer username?

William 'MindWorX' Mariager

14:07

I tried. ;)

Kortuk

@AnindoGhosh I edit it every time I see it, you had put a flag on that post so I saw it.

Anindo Ghosh

@Kortuk Right.

Kortuk

@AnindoGhosh It is nothing so crazy as some users being more important. If I see it I adjust it.

I dont always see it, but it was 1/3 of your post and there was only one post

I cant see everything, but it should be removed every time.

nothing personal, just should not be in answers.

Anindo Ghosh

@Kortuk Kind of odd that I have seen statements like that on answers ever since I joined. I'm always curious about any answer edits, so I also go in and check if I see an answer with a mod edit on an answer... which aren't all that common after all.

William 'MindWorX' Mariager

Well, this is going to take a while...

I'm messing with this old LCD display with two drivers on it. First driver has 64bit combinations, second driver has 40bit combinations.

I guess I should just trying to see if I can find a pattern of some kind.

Lots of combinations are just segments of numbers.

Kortuk

14:17

@AnindoGhosh I do that when I see it. I have done it to Olin multiple times by memory.

Russell probably the most.

William 'MindWorX' Mariager

I could map each bit to part of the display.

Kortuk

by memory, but I could be wrong on the numbers.

yogece

@AnindoGhosh hi

Anindo Ghosh

@yogece Hi

yogece

@AnindoGhosh i programmed the target(Atmega 8) without xtal and it worked fine

Anindo Ghosh

14:24

@yogece Excellent. It was working fine yesterday too, right? Just 1 MHz clock instead of 16 MHz.

yogece

@AnindoGhosh at first i followed your instructions.later i removed it and tested

Anindo Ghosh

@yogece The Xtal was added in that tutorial to ensure that if the MCU had already had its fuses set for external crystal, the programming would still work.

@yogece Not my instructions, instructions from your tutorial of choice :-)

yogece

@AnindoGhosh what is d default for osc

Anindo Ghosh

@yogece I added nothing extra except the cap on the reset pin

yogece

@AnindoGhosh i removed all the caps 10u,100u and it worked

Anindo Ghosh

14:27

@yogece Default from the factory is no oscillator (so any attached xtal just gets ignored). If the MCU had ever been used in a dev board like an Arduino or clone, then probably the fuses would be reprogrammed for external xtal.

William 'MindWorX' Mariager

I've programmed ATTiny2313 using an Arduino as a programmer without anything but some wires and a breadboard.

Anindo Ghosh

@yogece Removing the decoupling caps is a bad idea: They are there to stabilize the microcontroller (or other IC) in case of load spikes. Doesn't mean it won't work without decouplers, but it may show intermittent random problems

yogece

@William'MindWorX'Mariager for programming your target which programmer sw used?

William 'MindWorX' Mariager

I just used the Arduino software. :)

arduino.cc/en/Tutorial/ArduinoISP

yogece

@AnindoGhosh yes. i agree if we connect have load with the uC rails chances of getting trouble is more

@William'MindWorX'Mariager you know how to burn boot loader for ATmega8 using arduino IDE

abdullah kahraman

14:33

@AnindoGhosh Today, in the tramway, I saw two young indian couples. They were talking both their language and English at the same time, very mixed together.

William 'MindWorX' Mariager

@yogece Not sure what you mean. Arduino software can burn the bootloader as far as I know. Worked perfectly for my ATTiny2313 tests. :) I could program the IC's directly in the Arduino software. Didn't use anything else.

yogece

@William'MindWorX'Mariager are u expert in arduino?

William 'MindWorX' Mariager

Absolutely not. :P

I'm very very beginner at all this stuff. I just Google around and it usually works.

yogece

@William'MindWorX'Mariager fine

@William'MindWorX'Mariager do you develop games using c++

William 'MindWorX' Mariager

I prefer C#. I do know C++ though.

abdullah kahraman

14:41

►

coding_corgi

14:57

Yo yo yo!

rawbrawb

good morning all

coding_corgi

I have made my decision to retire from stackexchange.com (unless I have a question that really needs to be answered) Goodbye all!

Transcript for